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Dec. 20, 1955 Filed Deo l, 1954 @CDO P. H. BINDEL.

BUSINESS MACHINE 4 Sheets-Sheet l F/G I @D f3, C@

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@@eccaca@ INVENTOR. Pau/ H B/'nde/ Dec. 20, 1955 P. H. BINDEL 2,727,690

BUSINESS MACHINE Filed DeC. l, 1954 4 Sheets-Sheet 2 Q n v D@ 'gg w `m Iun f w im un (l DO lo J VENTOR.

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Dec. 20, 1955 P BlNDEL 2,727,690

BUSINESS MACHINE Filed Deo. l, 1954 4 Sheets-Sheet 3 JNVENTOR. Pau! HB/'Nde/ BY M, Mk, Md/Mm Dec. 20, 1955 P. H. BINDEL BUSINESS MACHINE 4Sheets-Sheet Filed Dec. l, 1954 Lw, MM@

United States Patent The present' invention yrelates-*to a'businessmachine` and moreparticularlyrto a1business;machine havingl an auxiliarykeyboard for use as acodifying fdevic'e." f

In the course of general oficeprocedureitis.often 'de,

sirable torcodifyihg 'the nameslof office personnel, busi-` nesslaccounts; etc., appearing on financial-data such as payroll'lists,account booksandfthe like,` so .as Ato main-x tain a degree ofdiscreetness regarding incomeV and .dis-

bursements.4 Such'tinancial-'data-is.itself usually prepared by use ofamachine such as acaleulating .machine or the like. Accordingly, :it isfageneral object of this invention to provide in a -business V'machinehaving'a main keyboard adapted-primarily for independent luse inthe same,manner as the keyboardvofa'conventional calcu-k latingmachineffortabulatingfnmnerical data ona tape or card, an auxiliary-'keyboard' foruse 'astaucodifying device cooperatingwithfthe keysfof the mainkeyboard.

whereby, through operation`r ofthe yauxiliary keyboard,

the name of the accountor person' `associated withfthe tabulateddatamay'be.y recorded -on` the tape' vorfcardby a series ofrepresentativenumbers arranged-according t0 a predetermined code-Another' object -of the inventionv is f to 'provide l a'fbusi-L nessmachine vhaving 'a main 'keyboardf and af detachable auxiliarykeyboard,'the auxiliary keyslof'which-maybede-r i tachably connected tocertain keys of the main keyboard i;

by mechanism` accommodating 'selective "operation" of "the connectedmainkeys independently ofthe auxiliarykeys, and which mechanismisresponsive'tov'individual'opera-.f5 tion of the r'auxiliary keys* yforlactuating `the individual: t

respective main keysv connected thereto:

A further object'of the invention'is'to provide a `busi-L v ness machinehavinga main keyboardfy providedzlwith'arf plurality of main keys'arranged inI coordinate :ranksiand` tilesythe keys in' each'fiileIrespectively#corresponding,tos numbers yin the same; numericalvordenfand `'ai detachable f auxiliary keyboard-provided withf aplnralityf'of auxiliary. L keys respectively correspondingtoletters'ofthe alphabet, s each auxiliary keyhbeingfdetachablyfconnected.totarepresentative 'main =key lor'plurality-ot main keysbyvmechanism accommodating selective operation-ofthe connected mainkeysindependently:ofzthe auxiliarykeys andybeing'responsive 'to individualoperationofi the auxiliary. 1

keys, the construction and arrangement being such'that .z

the letters'fon the auxiliary-keyboardrn'ayfbe entered intolthemachine'and recorded' `bya series: of .representa-1 tive numberswf f Yetanother objectl of' the' 'invention/is toprovide: af business Jmachine'as described ffaboveg@ whereinf. the

auxiliary keyboard lis easily? detachable yand embodies auf compact'`construction facilitating Litsl operation: and repair in a 'simple' andeconomical manneriand accornrnoe.` dating ready -assernbly'- of thefauxiliaryfkeyboard, "withH the main keyboard ofthe business machine'szfz Further features of the invention pertainlto the par-f.

ticular arrangement vrofithe elements offthe combination wherebyutheabove:v outlined! andaadditional operating t featuresfsare `obtainedrr`a 2,?21691) Fatented Dee. 20, i955 ICC the following specification takenin connection with the s accompanying drawings in which:

FigQl'is a plan `View of the business machine of the invention, showingthe main keyboard with the auxiliary keyboard attached thereto;

Fig. 2 is a rear elevational view of the business machine withv therecording tape omitted;

Fig. 3 is an enlarged fragmentary plan View of the machine with portionsbroken away to illustrate more clearly the mechanism interconnecting thekeys of the auxiliary keyboard and certain keys of the main keyboard;

Fig. 4` is an enlarged fragmentary View in elevation taken along theline 4 4 ofy Fig. 3, and showing more particularly a portion of themeans interconnecting a third tile of auxiliary keys and a second key inthe second iile of main keys;4

Fig. 5 .is an enlarged fragmentary View in elevation taken along theline 5-5 of Pig. 3, and showing more particularly a portion of the meansinterconnecting the second tile of auxiliary. keys and the iii-st key inthe second rile of keys on the main keyboard;

Fig. y6 is yan enlarged fragmentary View in elevation taken along theline 6--5 of Fig. 3, showing a portion 0f the mechanism forinterconnecting the third file of auxiliary keys and the second key inthe second le of main keys,v and showing in addition a portion of themeans interconnecting the third rile of auxiliary keys and the irst tileof mainkeys;y

Fig. 7v is an enlarged fragmentary View in elevation taken along theline 7-7 of Fig. 3, showing a portion of one representative auxiliarykey and its associated connecting means in. a retracted position;

Fig. (8,.is an enlargedV View similar to Fig. 7 but illustrating thesamemechanism when in a dei :esseci position; t

Fig. 9 .is an enlarged fragmentary View in elevation taken along line,9-9 of Pig. 3, showing the first key in the second tile of auxiliarykeys in a depressed position and the second key in the second tile ofauxiliary keys in a retracted position; and

Fig. 1Q is an enlarged fragmentary view in eievation takeny along linelil-lil of Fig. 3, showing more particularly the positions. ofinterconnecting means operative with the iirst and second keys in 'thesecond tile of main keys.

Referring now to Fig. l of the drawings, the business machine-20thereillustrated embodying t'ne features of the present invention,comprises a frame 2l and main keyboard' 22V of any conventional businessmachine, dis closed herein for the purpose of simplification, as aconventional adding machine. The keyboard includes a plurality ofdepressible and automatically retractable main keySQSarrangedincoordinate parallel ranks and les 2S, each tile consisting oit keyscorresponding to the digits 1 through 9, inclusive, arranged inprogressive numerical orderfrom the front of the machine to the rearthereof. .As best seenin Fig. i0, each m in key 23 is constructed inythe conventional manner and embodies a rectangular .stem 26 having areduced upper tongue forming a shoulder-.Z-with the lower portion of thestem,

each` stem'receiving a detachable numbered finger cap 29. Themain keys23 are operative, when depressed, for entering into the machine thecorresponding one of the digits. carried by the depressed keywliereinafter a lever vlillorthe like is operative, in tire weil knownmanner, for clearingthe machine and recording the proper numerical Adataon a tape 3l carried on a suitable roll at the rear of. the machine.

Further, the business machine includes a detachable auxiliary keyboard33 attached to the frame 2l and including a plurality of auxiliary keys34 arranged in coordinate ranks 35 and files 36. each of the nine ranks35 being substantially aligned with a corresponding rank 24 of the mainkeyboard. Each of the three files 36 of auxiliary keys respectivelycorresponds to a series of letters arranged in alphabetical order fromthe front of the machine to the rear thereof. the first file 37including the letters A through I. inclusive. the second tile 33including the letters I through R. inclusive, and the third tile 39including the letters S throuch Z, inclusive, the last key in the thirdfile being adapted for receiving any suitable symbol such as 85.

The business machine 2d comprises means for interconnecting theauxiliary keys and certain of the main keys 23 in a manner accommodatingselective operation of each main key independently of the auxiliary keysand whereby the letters in the auxiliary keyboard may be entered intothe business machine by a series of representative numbers, each numberhaving a position in the series corresponding to the alphabetic positionof the represented letter. More specifically, the arrangement of themeans is such that depression of any individual auxiliary key A throughi, inclusive. in the first le 37 of auxiliary keys, causes depression ofthe individual main key in the same rank in the first file .10 of mainkeys whereby the letters A to l. inclusive. may be entered into thebusiness machine 2t) by the representative numbers l to 9, inelusive,respectively. Also. depression of any individual auxiliary key I to R,inclusive, in the second file 38 of auxiliary keys` causes depression ofthe individual main key in the same rank in the i'irst le itl of mainkeys and in addition causes depression of the first (digit l) key in thesecond tile of main keys whereby the letters I to R, inclusive, may beentered into the business machine by the representative numbers ll to19, inclusive, respectively. Finally` depression of any individualauxiliary key S to Z, inclusive` in the third file 39 of auxiliary keys,causes depression of the individual main key in the same rank in therstfile il? of main keys and in addition causes depression of the second(digit 2) key in the second le il of main keys whereby the letters S toZ and the symbol @1, inclusive, may be entered into the machine by therepresentative numbers 2l to 29, inclusive, respectively. in view ofthis general description of the business machine, it will be understoodthat an operator may use the main keys 23 independently of the auxiliarykeys 34 for tabulating numerical data on the tape 31 and may thereafteridentify the data with the codified name of the associated person oraccount by depressing the auxiliary lettered keys corresponding to theletters of the name, thereby entering into the machine and recording byoperating lever 3f", the corresponding group of representative numberson the tape.

Referring now more particularly to Figs. l to 3, inclusive, of thedrawings, the auxiliary keyboard there illustrated comprises a box-like,rectangular casing 42 including end plates and side plates i5 and d6, abottom plate 47, and a removable cover plate 43 provided with aplurality of apertures (not shown) for receiving the auxiliary keys Thecasing may be detachably secured in the position shown most clearly inFigs. l and 2 by an elbow bracket St) located at each end of the casing,each of which brackets is secured at its lower end to the bottom plate47 as by screws 5E and secured at its upper end to the upper right-handside of the frame 21 as by screws 52 threadably received in the frame.As previously noted, the auxiliary keyboard 33 further comprises theplurality of auxiliary keys arranged in coordinate ranks and files Eachrank 35 is substantially aligned with a rank 24- of main keys and eachfile I 36 accordingly includes nine keys, there being three les ofauxiliary keys arranged substantially parallel to the construction andas best shown in Figs. 5, 7, 9 and 10 each embodies an upstandingcylindrical stem 53 secured at its lower end to the bottom plate 47 andcarrying a slidable collar 54 provided with a cylindrical neck 55 and anenlarged lower portion 56, the neck having an upper planar bearingsurface 57. The collar is biased into a normal upper retracted positionby a coiled spring 58 surrounding the stem 53 between the bottom plateand the underside of the enlarged lower portion 56. As best seen inPigs. 5 and l0, the collar is provided with a button-like cap 59including a lower tubular portion 60 extending slideably through anaperture (not shown) in the cover plate 48 and telescopically receivingthe upper free end of the upstanding stem 53. The lower end of thetubular portion 6l) engages and rests upon the bearing surface 57 sothat the cap 59 functions as a finger engageable actuator for depressingthe collar 54 against the action of the spring 5S. The upper surface ofeach cap S9 is adapted for receiving a symbol as a letter or the likeand, as previously noted, the first file 37 of auxiliary keys includesthe letters A to I, inclusive, the second file 38 includes the letters Ito R, inclusive, and the third file 39 includes the letters S to Z andthe symbol &, inclusive.

Also the invention comprises mechanism accommodating selective operationof the main keys 23 independently of the auxiliary keys 34 andresponsive to the operation of any individual key in the first file ofauxiliary keys A to l, inclusive, for operating the individual main keyin the same rank in the first file 40 of main keys. As best seen inFigs. l to 3, inclusive, each main key in the first file 4@ of main keysis provided with a detachable cam plate 61 provided with a rectangularslot 62 (Fig. 3), each of the plates having a portion thereon disposedtoward the aligned rank of auxiliary keys and adapted to be depressivelyengaged by a cam finger, as subsequently described. Each cam plate maybe assembled upon a particular main key 23 by removing the cap 29 andslipping the plate and slot 62 over the tongue 27 until the plate bearson the stem shoulder 28, whereupon reassembly of the cap 29 iixedlysecures the cam plate on the stem 26.

Each rank 35 of auxiliary keys is provided with a longitudinallyextending cam shaft-63, each shaft having its right-hand end (as viewedin Figs. 3, 4 and 5 rotatably supported in the right-hand side plate 46and being rotatably supported intermediate its ends in the left-hand fdownwardly into a lower operated position from a normally elevatedposition (Fig. 5), when the cam shaft is rocked clockwise (as viewedfrom the right-hand side of the casing 42), for engaging the associatedcam plate and depressing the particular main key in the first file 40 ofmain keys.

The mechanism comprises a lost motion connection 66 (Fig. 3) betweeneach collar 54 in the first tile 37 of auxiliary keys and a respectiveforwardly associated cam shaft 63 for rocking the associated cam shaftin a clockwise direction when the particular cap 59, which-bears on thecoliar, is depressed. As best shown in Figs. 3, 7 and 8, each lostmotion connection 66 is of substantially identical construction andembodies a cylindrical sleeve 67 rotatably mounted on the particularassociated earn shaft 63 and having an annular slotted cam track 68facing the particular associated collar 54 and terminating to form anormally upwardly disposed shoulder 69 (Fig. 7). A cam follower 70isllixed to the shaft 63 for riding movement in the cam track 68 and isnormally disposed upwardly in engagement with the shoulder 69 when thecam finger 64, carried by the particular shaft 63 is in the norrnallyelevated position. Thus the follower 70 is in engagement with theshoulder 69 when the-sleeve 67 is rocked in a clockwise direction andimparts clockwise rotation to the shaft 63 for swinging the cam finger64 into its lower operated position for depressing the particular mainkey associated therewith. Also the length of the cam track 68 is suchthat the follower 70 can ride free of the shoulder 69 in a clockwisedirection and return, thus accommodating rocking of the shaftindependently of the sleeve 67 for swinging the cam finger betweennormal and operated positions. Each sleeve 67 also is provided with anormally upstanding arm 71 having its lower end fixed to the sleeve 67and its upper end pivotally connected to the upper end of a link 72which is pivotally secured at its lower end to a collar 54 positionedrearward of each sleeve. 67. Finally, the cam finger 64 is biased intoits upper normal position and the cam follower 70 is biased intoengagement with the cam track shoulder 69 by a coiled spring 73connected between a lower portion of the left-hand side of the casing 42and a forwardly extending arm 74 fixed to the cam shaft 63 (Figs. 4, 5,7 and 8).

In view of the foregoing, it will be understood that depression of anykey in the first file 37 of auxiliary keys causes depression of a collar54 associated therewith and imparts clockwise rotation to a respectivesleeve 67 and associated cam shaft 63 whereby the associated cam linger64 is swung into engagement with and depresses the cam plate 61 andassociated main key in the same rank in the first file 40 of keys in themain keyboard. Accordingly, the first auxiliary file of keys includingthe letters A to l, inclusive, may be entered into the adding machine bya series of representative numbers, l to 9, inclusive, respectively,each number having a position in the series corresponding to thealphabetic position of the represented letter.

Referring now more particularly to Figs. 3, 4, 5 and 9, inclusive, theinvention further comprises mechanism accommodating selective operationof the main keys 23 independently of the auxiliary keys 34 andresponsive to ythe operation of any individual key in the second file ofauxiliary keys I to R, inclusive, for operating simultaneously theindividual main key in the same rank in the first file 40 of main keysand also the first key or digit #l key in the second file 4E of mainkeys.

As best shown in Figs. 3 and 9, each auxiliary key in the second file 38of auxiliary keys is connected by a lost motion connection 75 to thesame cam shaft 63 as operated by the auxiliary key in the same rank inthe first file 37 of auxiliary keys. As most specifically shown in Fig.9, each lost motion connection 75 is substantially identical inconstruction and function to the lost mo tion connections 66 andembodies the same parts 67 to 72', inclusive, respectively, (shown asprimed numbers for purposes of clarity), the only structural differencebeing that the upstanding arms 71' and links 72 are attached to theright-hand side of the rotatable sleeves 67' and slidable collars 54,respectively. As previously noted, the length of the cam track 68 issuch that the follower 70 can ride free of the shoulder 69 in aclockwise direction and return, thus accommodating rocking ofthefassociated cam shaft 63 independently of the sleeve 67 for swingingthe associated cam finger 64 between normal and operated positions.Thus, depression of any individual auxiliary key in the second file38 ofauxiliary keys operates to rock the particular associated cam shaft'63independently of the auxiliary key in the first file 37 of auxiliarykeys connected to the same shaft 63 by a lost motion connection 66.

Further, as shown in Figs. l, 3, 5 and l0, the first key or digit #l keyin the second file 41 of main keys is provided with a cam plate 76including a rectangular slot 77 (Fig. 3) which cam plate 76 isdetachably assembled-*with the particular main key stem26 in thesamemanner-I as cam plates 61 were assembled with the first file 40 of4main keys, the cam plate 76 having aportion disposed rearwardly betweenthe first and second ranks 24 of main keys for depressing engagement bya lever as subsequently described.

Finally the mechanism comprises a cam shaft and link arrangement wherebydepression of any individual key in .the second file 38 of auxiliarykeys operates to depress the cam plate 76 and digit #l key in the secondfile 41 of main keys. As best shown in Fig. 3, a cam shaft 78 isdisposed longitudinally between the first file 37 and second file 38 ofauxiliary keys and is supported for rotation at opposite ends in the endplates 43 and 44, respectively, of the casing 42. Each key in the secondfile 38 of auxiliary keys is connected to the shaft 78 by a lost motionconnection 79 (Fig. 9) of substantially identical construction to lostmotion connections 66 and 7S and being operative, upon depression of anyindividual key in the 4vsecond file 38 of auxiliary keys, for rockingthe shaft 78 in a clockwise direction (viewed from the front of thebusiness machine 20). Each lost motion connection embodies a cylindricalsleeve S0 (Fig. 9) rotatably mounted on the shaft 78 and having anannular slotted cam track 81 facing the particular associated collar 54in the second file 38 of auxiliary keys which cam track terminates toform a normally upwardly disposed shoulder 32. A cam follower 83 isfixed to the shaft 78 for riding movement in the cam track 81 and isnormally disposed upwardly in engagement with the shoulder 82. When thesleeve 80 is rocked in a clockwise direction the shoulder impartsclockwise rotation to the shaft 78 through the cam follower 83. Also thelength of the cam track 81 is such that the follower 83 can ride free ofthe shoulder 82 in a clockwise direction and return, thus accommodatingrocking of the shaft by operation of any individual key in the secondfile 38 of auxiliary keys independently of the other auxiliary keys inthe same file. Each sleeve S0 also is provided with a normallyupstanding arm 84 having its lower end fixed to the sleeve 80 and itsupper end pivotally connected to the upper end of a link 85 which ispivotally secured at its lower end to a particular collar 54. Also, asbest shown in Figs. 5 and 9, the cam shaft 78 carries a normallyelevated yoke and roller 86 fixed to the shaft 78 by an arm 87, whichyoke and roller is also disposed between the first and second ranks ofmain and auxiliary keys for rocking motion between a normal elevatedposition (Fig. 5) and a lower operated position (Fig. 9) wherein theroller is operative for actuating link mechanism communicating with camplate 76 for depressing the digit #l key in the second file 41 of mainkeys. The roller S6 is spring biased into the normal elevated positionby the action of a coiled spring 88 (Fig. 3) at each end of the camshaft 78, one of which springs is shown connected at its upper end to anarm 89 fixed to the shaft iti and connected at its lower end to thebottom plate 47 of the casing 42 (Fig. 2).

The link mechanism comprises a first lever 90 (Fig. 5) disposed beftweenthe first and second ranks of auxiliary and main keys and pivotallymounted left of center to a stud 91 carried by the bottom plate 47. Therighthand end of the lever 9i) underlies the roller 86 and is arrangedto be depressed by the roller when swung Vinto its operated position bythe rocking motion of cam shaft 78. The left-hand end of the leverengages the underside of the rightehand end of a second lever 92, whichsecond lever is longitudinally disposed with respect to the first lever90. Also, the second lever 92 is pivotally mounted right of center to astud 93, threadably received in the frame 21, the left-hand end of thelever 92 overlying and resting on cam plate 76 for depressing the camplate and associated digit #l key in the second file 41 of main keyswhen the roller 86 is in the operated position.

in view of the foregoing, it will be understood that depression of anykey in the second file 38 of auxiliary 2,77l9- f 9 a positionfin theseries corresponding -rto the Lalphabetic position ofthe representedletter.y

While there has been described an embodimenty of the x invention, itwill be understood that various modifications may be made therein, andit is intended to cover inthe appended claims all such modicationsasfall .within'thc true spirit and rscope of the invention..

What is claimed is:

l. In a vbusiness machine including a. main keyboard provided with aplurality of main keys arrangedxin coordinate ranks and files andrespectively corresponding to a plurality of first individual charactersand individually operative to enter into said machine the correspondinglink mechanisms are ysubstantiallygidentiealtiand cachemire..priseszarshaftg;meansl on said. sbatte-foi:- operatingithe said@` mairrkey -corresponding to; said-.shaftaawhen-.said ...slaafl is rotated-,xvand. independent :connectingrmeans .between u. said'shaft. and eachauxiliary. keyiirthe rank oftauxiliary keys correspondingtosaid shaftfor rotatingsaid shaft.,.. when any onetofthe latter .of said:,keys.-iszoperated..;fr

5. The combinationsetforthinaclaim 3,.rwhereinr4 said link .mechanismsare substantially.lidenticalrandteach co prises a 'shaftfmeanson saidshaftl for operatingthe said.. .z maink key corresponding. to,lsaidvshaftrwhen saidshaft.;` is rotatedaa.pluralitynofcollars..-rotatably.mountedzon said shaft, one ,collarforeaichfauxiliary.' key yinthe rankuq.y

one of said first characters; the combination comprising an auxiliarykeyboard provided with a plurality of auxiliary keys arranged incoordinate ranks and files and respectively corresponding to a pluralityof second individual characters, and link mechanism operativelyinterconnecting said auxiliary keys and said main keys, said mechanismaccommodating selective operation of said main keys independently ofsaid auxiliary keys and being responsive to operation of any individualauxiliary key in a first le of said auxiliary keys for operating theindividual main key in the same rank in a first le of said main keys andresponsive to operation of any individual auxiliary key in a second fileof said auxiliary keys for operating both the individual main key in thesame rank in said first file of said main keys and also a particularmain key in a second file of said main keys.

2. In a calculating machine including a main keyboard rovided with aplurality of main keys arranged in coordinate parallel ranks and filesand respectively corresponding to a plurality of individual digits andindividually operative to enter into said machine the corresponding oneof said digits; the combination comprising an auxiliary keyboardprovided with a plurality of auxiliary keys arranged in coordinate ranksand les substantially parallel with the ranks and files respectively ofthe main keyboard and respectively corresponding to a plurality ofindividual letters of the alphabet, and link mechanism operativelyinterconnecting said auxiliary keys and certain of said main keys, saidmechanism accommodating selective operation of said main keysindependently of said auxiliary keys and being responsive to operationof any individual auxiliary key in a first file of said auxiliary keysfor operating the individual main key in the same rank in a first fileof said main keys and being responsive to operation of any individualauxiliary key in a second file of said auxiliary keys for operating boththe individual main key in the same rank in said first file of main keysand also a particular main key in a second file of main keys.

3. ln a business machine including a main keyboard provided with aplurality of main keys arranged in coordinate ranks and files andrespectively corresponding to a plurality of first individual charactersand individually operative to enter into said machine the correspondingone of said first characters; the combination comprising an auxiliarykeyboard provided with a plurality of auxiliary keys arranged incoordinate ranks and files and respectively corresponding to a pluralityof second individual characters, and a plurality of independent linkmechanisms, one for each rank of auxiliary keys, each of said mechanismsoperatively interconnecting every key in its corresponding rank ofauxiliary keys with a single corresponding main key of the same rank ina rst file of said main keys, said link mechanisms accommodatingselective operation of all of said main keys independently of saidauxiliary keys and accommodating selective operation of each auxiliarykey independently of the other auxiliary keys, each of said linkmechanisms being effective upon actuation of any auxiliary key in itscorresponding rank of auxiliary keys to operate the said single main keyof the same rank in said first iile of main keys.

4. The combination set forth in claim 3, wherein said of auxiliary keyscorresponding to said shaft, each of said collars having acircumferentially extending elongated slot therein, individual radiallyextending projections on said shaft riding in each of said slots wherebyrotation of any one of said collars will impart rotary motion to saidshaft independently of movement of the other collars, and meansconnecting each collar to its corresponding auxiliary key for rotatingthat particular collar, and thereby rotating said shaft, when saidcorresponding auxiliary key is operated.

6. 1n a business machine including a main keyboard provided with aplurality of main keys arranged in coordinate ranks and files andrespectively corresponding to a plurality of first individual charactersand individually operative to enter into said machine the correspondingone of said first characters; the combination comprising an auxiliarykeyboard provided with a plurality of auxiliary keys arranged incoordinate ranks and files and respectively corresponding to a pluralityof second individual characters, a plurality of independent first linkmechanisms, one for each rank of auxiliary keys, each of said first linkmechanisms operatively interconnecting every key in its correspondingrank of auxiliary keys with an vindividual corresponding main key of thesame rank in a first file of said main keys, and second link mechanismoperatively interconnecting every auxiliary key in one file of auxiliarykeys to a single key in a .second le of said main keys, said linkmechanisms accommodating selective operation of all of said main keysindependently of said auxiliary keys and accommodating selectiveoperation of each auxiliary key independently of the other auxiliarykeys and being responsive to operation of any auxiliary key in said onele of auxiliary keys for operating both the said individualcorresponding main key of the same rank in said first file of said mainkeys and also said single key in said second file of main keys.

7. The combination set forth in claim 6, wherein said second linkmechanism comprises a shaft extending substantially parallel to said onefile of auxiliary keys, means actuated by rotation of said shaft foroperating single key in said second ille of said main keys. andindependent connecting means between said shaft and each auxiliary keyin said one file of said auxiliary keys for rotating said shaft when anyone of the latter of said keys is operated.

8. In a calculating machine including a main keyboard provided with aplurality of main keys arranged in coordinate parallel ranks and filesand respectively corresponding to a plurality of individual digitsarranged from l to 9, inclusive, in numerical order in each file, eachmain key being individually operative to enter into said machine thecorresponding one ot said digits; the combination comprising anauxiliary keyboard provided with a plurality of auxiliary keys arrangedin coordinate ranks and files, said plurality of auxiliary keysrespectively corresponding to the letters of the alphabet arranged inalphabetical order from A to I, inclusive, in a first lile of saidauxiliary keys, from J to R, inclusive, in a second file of saidauxiliary keys and from S to Z, inclusive, in a third file of saidauxiliary keys, and link mechanism operatively interconnecting saidauxiliary and main keys, said mechanism accommodating selectiveoperation of the main keys independently of said auxiliary keys andbeing responsive to operation of any individual auxiliary key in saidfirst tile of auxiliary keys for operating the individual main key inthe same rank in a first le of main keys and being responsive tooperation of any individual auxiliary key in said second le of auxiliarykeys for operating both the individual main key in the same rank in therst le of main keys and also the digit #l key in a second le of mainkeys and being responsive to operation of any individual auxiliary keyin said third le of auxiliary keys for operating both the individualmain key in the same rank in the rst le of main keys and also the digit#2 key in the second le of main keys whereby the first le of auxiliarykeys including the letters A to I, inclusive, may be entered into saidmachine by a series of representative numbers l to 9, inclusive,respectively, and the second le of auxiliary keys including the lettersI to R, inclusive, may be entered into said machine by a series ofrepresentative numbers ll to 19, inclusive, respectively, and the thirdfile of auxiliary keys including the letters S to Z, inclusive, may beentered into said machine by a series of representative numbers 2l to28, inclusive, re-

10 spectively.

No references cited.

